Teenage Mutant Ninja Turtles Mutants in Manhattan

Gold bars are found in the first and second stages. Drag 30 pieces and get a trophy
It is best to boost at the second stage of Rocksteady. The very first mission will be to drag gold bars. If the first mission is not to drag bars, then exit and start the mission again. It appears approximately 1 in 5. It is better to do this trophy after you have received the trophy for protecting ATMs and for rolling bags of gold, which we do at the first stage. So, while completing missions to get these two trophies, you may come across a mission to drag bars

You can complete the gold bar quest and exit after completing it, I got the trophy this way, I checked it on purpose, but I recommend waiting for the next quest to start, or wait until the blue barrier goes down.
And I'll add that this works on any tasks that are needed for trophies, we also checked it.